Method and Apparatus for Displaying Monochrome Images on a Color Monitor
First Claim
1. A method for increasing the perceived monochrome luminance values of a color display system capable of displaying a plurality of pixels, each pixel comprising a red color component, a blue color component, and a green color component, wherein the luminance of each color component is independently controllable according to an n-bit control value, and wherein each pixel is capable of displaying a plurality of true monochrome luminance values by setting the luminance of each color component of a pixel to a same n-bit control value thereby allowing the display of 2n true monochrome luminance values, the method comprising the steps of:
- receiving input digital image values comprising greater than 2n true monochrome luminance values; and
generating intermediate perceived monochrome luminance values between first and second true monochrome luminance values by varying the n-bit control values of the color components of a pixel such that at least two of the n-bit control values of the color components of the pixel are different from each other.
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Abstract
Disclosed is a method for increasing the number of grey levels used to create a monochrome image on a color display which comprises pixels with individual red, green, and blue color components. If the luminance value of each color component is controlled by an n-bit value, the number of true monochrome grey levels resulting from equal control values of each color is 2n. By adjusting the luminance of each color component such that the luminances of at least two color components are different from each other, intermediate values of luminance may be formed. Under specified conditions, the resulting light emission has intermediate luminance values which are perceived by human vision, and color values which are still perceived as grey. The resulting number of perceived grey levels is greater than 2n.
12 Citations
12 Claims
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1. A method for increasing the perceived monochrome luminance values of a color display system capable of displaying a plurality of pixels, each pixel comprising a red color component, a blue color component, and a green color component, wherein the luminance of each color component is independently controllable according to an n-bit control value, and wherein each pixel is capable of displaying a plurality of true monochrome luminance values by setting the luminance of each color component of a pixel to a same n-bit control value thereby allowing the display of 2n true monochrome luminance values, the method comprising the steps of:
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receiving input digital image values comprising greater than 2n true monochrome luminance values; and generating intermediate perceived monochrome luminance values between first and second true monochrome luminance values by varying the n-bit control values of the color components of a pixel such that at least two of the n-bit control values of the color components of the pixel are different from each other. - View Dependent Claims (2, 3, 4)
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5. A system for increasing the perceived monochrome luminance values of a color display system capable of displaying a plurality of pixels, each pixel comprising a red color component, a blue color component, and a green color component, wherein the luminance of each color component is independently controllable according to an n-bit control value, and wherein each pixel is capable of displaying a plurality of true monochrome luminance values by setting the luminance of each color component of a pixel to a same n-bit control value thereby allowing the display of 2n true monochrome luminance values, the system comprising:
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means for receiving input digital image values comprising greater than 2n true monochrome luminance values; and means for generating intermediate perceived monochrome luminance values between first and second true monochrome luminance values by varying the n-bit control values of the color components of a pixel such that at least two of the n-bit control values of the color components of the pixel are different from each other. - View Dependent Claims (6, 7, 8)
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9. A computer readable medium storing computer program instructions for increasing the perceived monochrome luminance values of a color display system capable of displaying a plurality of pixels, each pixel comprising a red color component, a blue color component, and a green color component, wherein the luminance of each color component is independently controllable according to an n-bit control value, and wherein each pixel is capable of displaying a plurality of true monochrome luminance values by setting the luminance of each color component of a pixel to a same n-bit control value thereby allowing the display of 2n true monochrome luminance values, the computer program instructions defining the steps of:
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receiving input digital image values comprising greater than 2n true monochrome luminance values; and generating intermediate perceived monochrome luminance values between first and second true monochrome luminance values by varying the n-bit control values of the color components of a pixel such that at least two of the n-bit control values of the color components of the pixel are different from each other. - View Dependent Claims (10, 11, 12)
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Specification